Hot Electron Transport on Three-Dimensional Pt/Mesoporous TiO 2 Schottky Nanodiodes

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Title
Hot Electron Transport on Three-Dimensional Pt/Mesoporous TiO 2 Schottky Nanodiodes
Author(s)
Beomjoon Jeon; Hyosun Lee; Kalyan C. Goddeti; Jeong Young Park
Publication Date
2019-04
Journal
ACS APPLIED MATERIALS & INTERFACES, v.11, no.16, pp.15152 - 15159
Publisher
AMER CHEMICAL SOC
Abstract
© 2019 American Chemical Society. We present the design of a three-dimensional Pt/mesoporous TiO 2 Schottky nanodiode that can capture hot electrons more effectively, compared with a typical two-dimensional Schottky diode. Both chemically induced and photon-induced hot electrons were measured on the three-dimensional Pt/mesoporous TiO 2 Schottky nanodiode. An increase in the number of interfacial sites between the platinum and support oxide affects the collection of hot electrons generated by both the catalytic reaction and light injection. We show that hot electrons flowing 2.5 times higher are detected as the current in the mesoporous system, compared with typical two-dimensional nanodiode systems that have a planar Schottky junction. Identical trends for the chemicurrent and photocurrent in the mesoporous system demonstrate that the enhanced hot electrons are attributed to the larger interface area between the metal and the mesoporous TiO 2 support fabricated by the anodization process. This three-dimensional Schottky nanodiode can provide insights into hot electron generation on a practical catalytic device
URI
https://pr.ibs.re.kr/handle/8788114/5991
ISSN
1944-8244
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
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